W32.Naco.B@mm is a mass-mailing worm that attempts to spread itself through the email and file-sharing networks. The worm also contains Backdoor functionality and attempts to replace HTML files on the Microsoft IIS server.

This threat is written in the Microsoft Visual Basic (VB) programming language. The VB run-time libraries are required to execute W32.Naco.B@mm.

NOTE: Due to bugs in the code, W32.Naco.B@mm may not properly work.

Antivirus Protection Dates

Initial Rapid Release version May 27, 2003

Latest Rapid Release version September 28, 2010 revision 054

Initial Daily Certified version May 27, 2003

Latest Daily Certified version September 28, 2010 revision 036

Initial Weekly Certified release date May 28, 2003

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